Mobile power supply



FIG. 1 is a perspective view from the front, top, and left of a mobile power supply;

FIG. 2 is a perspective view thereof, from the front, bottom, and left;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a front view thereof; and,

FIG. 8 is a rear view thereof.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a mobile power supply, as shown and described. 